Type-writer.



G. W. DUNNING'.

TYPE WRITER.

APPLIGATION HLID $131221, 1903.

Patented Jan. 26, 1915.

[NVENT-OIR': Walz/2M lli esonera n'onmne. or nner enanos, New messy, Assren'on fro HARRY r.

mannose, or ORANGE, new .innerer @riginal application led sTune 21. 1901,

v Specification of Letters Patent.

1903. Serial No. 3.274,965.

To (IZ :1i/wm it 'may cmu-cm Be 1t known that l.'Gnoaen lll. Donnino,

a citizen ot the United States, residing at.

Plast Grange, in the` county of Essex and State' ot N ew Jersey, have invented certainy new and useful' llniproveinents in Ty Jel'i'riters; and l do hereby decla-re the tollowing to he a full, clear, and exact description oil the invention, such' as will enable others skilled in the art to which it apper- Vtainsjzo malte `and use the same.

invention relates to an improved type-bar carrying a multiple-type heawd for typewriting machines, and so constructed as tohe compact andi durable in construction and certain in operation.

The invention is fully disclosed in United State-,s Patent No. 745,163, issued November 24th, w03; the present .ipplication constituting a true division of the application upon which that was granted.

My invention resides in a construction in which interference ,or inipact lbetween despending and ascending 'type-heads `will cause the ascending type-head toshift Sulliciently to preventl interlocking andjamming; ofsuch interfering type-heads, 'while' the descending type-head will he positively blocked against being shifted thereby in a.

direction opposite to descent of the-lrr` r.

My invention consists' in the* constructions, combinations, and arrangements herein described and claimed. y

In aoco '.panying drawings, tormingT -a part oi this application and in which "nilar reference symbols indicate correg parts in the several. yiews: Figure sectional elevation of a. typewriting with parte oi'nitted for clenrness,

illustrating my invention applied thereto;l

and l .0. 2 is a. detail elevation on :i larga'r showing my nnproi'ed multiple-typer 'erring to the drawings, in which l have illustrated a Hat-platen, or hook, typewriter. o; indicates a type-har of any desired shape, pivotallj carrying a multiple typehead rr. shown as provided with three type. and' ZL. `-"lie type-head is provided with an extension or lug ff', which is connected hy link 0,* with. an actuating lever 0". flhe lever pivotally supported on the type-bar, and is pro\'lded .vi`th a tail piece a constructed to shiftahle n* is disengaged 'from the teeth' c7.

member- 7; upon 'increment of the type-bar. Teeth or progei'ftions ai are formed on ,the lever c5 and with these engages a spring element or pawl c carried by the type-har and provided with an arm u. arranged to engagea type-head releaser al "when the typeharl 1s in its upward, normal position. It desired, the arm a may constitute a loop einhracing the type-har. A spring c2, carried hy the type-bar, is connected to the lever a? and acts to return the,typehea'd t0 its'normal position when the spring pawl The lower end of the type-har is pi'voted at ci in a guide-yoke c, shown secured to a base plate Z `hy a screw e. This guide-yoke is preferable to the usual pivot or cone-bearing support, in thatit provides a broad guidino" surface -for th'e type-har throughout the latter-s ent-ire arc ot movement, thus preventing lateral play of thettype-bar with slight friction.

EL linlr'f is shown connecting a toe a on the type-bar with 'theinner arin of a keylever 57, which latter is pivotally supported at z and'is provided'with a. .finger-piece Suitable means, such as a turn-buckle fl, may he provided for adjusting the length ci the link f. A spring ggis shown connecting the "innerend of the key-lever' and the type-head releaser, foiireturning the keylever to its normal-position. ,l

The means for operating the actuatinglever c preferably comprise a segmental bar Z) carried ley hangers er rods Z, Whichdatter are guided openingsfornied in the hase plate d 'andty-,pe-head releaser al", or in any otherI convenientgportionoif the typewriter traine.

A saatt fm., extending transversely of .the typewriter, carries adyacent each end a bell-crank m1, which is pivotally conioo incenso larger radius than the pin 7", as clearly' .shown in Fig. l.

'It will be understood that, upon'actuation of the cap-key-lever r, the operating bar l) will be raised from its normal position-that shown in Fig. l-to its intermediate position; and that,' upon actuation of vthe nunieialkeylever s, the bar o will be raised to its highest position. It will -t'urther be clear that, upon actuation of the cap-keylever, the pin s* of the iiunreral-key-lever will slide in its engaging slot, and vice versa, so that actuation ot' either ot' said shiftlevers will in no manner ali'ect the other.

`Upon release of either ot' the shift-levers,

the operating bar b and its attached parts may bereturned to their norinal, lowest position by gravity, or by a spring. When it is desired to print'a lower-case character, the key-lever g ,is actuated and this operation swings the type-bar downward andA brings the lower-case type t into printing contact with the paper. The bar 7) being in its normal or lowest position, will not engage the `tail-piece a to Vshi'ltnthe type-head.

v When, however, an upper-case character is to be printed, the cap-lever I1' is actuated to shift the bar b to its intermediate position. The key-lever g is then actuated toiswing ythe type-bar downward, whereupon the tailpiece o will engage the bar o and shift the type-head suiiiciently to bring the upper-i case type t1 into printing position. The spring pawl a, by engaging the teeth ai, positively blocks the type-head, when'linl any of itsjadjusted positions, againstturning in the directions of the hands ot a watch, yas

shown in Fig. 2. As will beseen, the teeth o? are so formed and disposed in relation to the en aging end of the pawl that the latter will eiectually beai against said teeth and' block the head against any tendency to re- Upon release of the key-lever g, the typediar returns to its-normal, upright position, and

- the arin o" contacts with the type-head reinto its norinal position.

leaser c1 and forces the spring pawl fr iii-oui engagement with the teeth el, thus permitting the spring to swing the type-head Should the bar 7; be in one or another of its raised positions during such return of the type-bar, the

tail-piece o will readily ride over the inclined i'ace thereof, winch tends slightly to 'raise the head-shifting device, comprising the 'lever a5 and the link of. Thebar L, therefore, may be engaged hy the tail-piece a twice during its travel to and from the printing-point, and during each of such engagenients serves to actuate thehead-shifting device. The shifting of the device during the upward travel of the type-bar is sufficient to permit the type-bar to return of descending bars. Besides, it could not become properly positioned to allow the arm ot"- the spring-pawl a to strikel the head reA leaser al* and release the head and permit it to return to its normal position. It will be observed that, by reasonoi the fact that the trip o is arranged in relatively close proximity to the lever 5 and also 'is juxtaposed to the ful'ciiini of the .type-bar, considerably less power will be required to actuate the key lever when the type-head has to be shifted than it said trip were otherwise disposed. As a result, a comparatively light spring (g2) for restoring the key-lever to normal position may be employed. By -this arrangement and cpnstriiction, a light, smooth and easy action 'of the parts is obtained. lli a numeral is to be printed, the numeralshiitkey .s is actuated to shift the bar 7;

'to its highest position, whereupon, during .subseri'ing the function of a blocking inem` ber, holds, yblocks and rigidly retains the headiigainst rotation in o: direction, Athat is, in a direction opposite to the descent of the bai', and thus operates for an important purpose: It preventsundesirable shifting of the head to a different printing position,

whein'for instance, it is in its second or interinediate rhifted position, or is in its third or final sliiifted position. l provide a separate and distinct element to effect the blocking, namely, the pawl as, which engages the teeth clin. the lever a5. Such a donstruction is to' be distinguished l'roni the provision oi' mere banking or abutting-faces. sdealled, on the periphery of 'a type-head and the sides ot'. the type-bar,

In this connection,

which serre merely to prevent excessive and complete rotation of the head in either direction; and, also, from a yielding detent which merely sei-vesto hold the head against unrestrained rotation, as by` centrifugal force. In theA case of the so-called banking faces, there is no blocking of the head in the sense in which employ the terni because,

in my device, the blocking practically occurs sin'iiiltaneously with the shifting of the head, that is, iii'n'nediately' upon the completion of the shifting or adjustment of the head to one of its shifted positions. l

The head is actuated or shifted, as already described, when the tail-piece a o'tne lever during its travel messen' a5 engages the bei' b and moves the link e" which is connected to the head, and this head-shifting-deviee and the head nre blocked against movement in one direction. The blocking-member as and the iever a also constitute a combined head-shifting and blocking mechanism which possesses the desirable characteristic of being positive in operation and safeguards agxiinst undesirable actuation of the head into, the wrong printing descending bnr impinges against :my object to the printing-point.

`While I have illustrated my invention applied to a typehend provided with three y type, it is obvious that e' greater or less number. could be employed, if desired.

Having thus fully described my invention, what I claim as new, and de:A i to secure by Letters Patent is:

l. In -a typewriter, a type-bar provided with a type-cerrying-head sbifteble to n plurulity of printing positions, a movable device carried by the bnr for blocking tbe head against movement in one direction, and independent means carried by the bar and con.- stuntly exerting n force to hold the bend under action of the blocking device.

In e typewriter', n type-bar having n movable head adapted to be actuated completely and simultaneously blocked against movement in one direction in e predetermined position tovvurd the outset of its ilmvnward stroke, and n blocking member carried by the bar, co1nbined.\\'ith means constructed t0 shift the head, und a single means for disengagingthe blocking member and for maintaining the head normally free' while the type-bar is in its upright, normal position.

3. In u typewriter7 u type-bnr csi'rying :i movable head constructed to be actuated toposition in the event thel heed of n lable pci'tions simultaneouslywith it b' wird the conii'neneenieifit ment and siinniteneousiy i movement in one direction, with ineens carried oy the tv ecting ictus tion end biociiing o. means independent of means for eiecting of from the blocking Ineens, end mi. storing the type-head to nornizi i. fin-e typewriter, the co :i typeber carrying e moi/fit! rocking-erm pivoted 'i bar, :i linlr dependin und connecting w'th the reciting s tions formed on the reciting-er blocking member disposed on rindY engaging seid serrations.

in e typewriter, the combination with t' :t typeebnr having e bend ehiiteble to .ii rzility of positions, of s hendl'shifting; dei carried bythe typt-bar for shifting the head, n blocking member carried by tbe i: and constructed to bloeit the iiend rotation, in one direction in any 'of it ing actuation, and springsctniiti iff nie carried by the type-bnr and conn the heed-shifting device the typehezid to norme-,i i ating mechanism arrange. head-shifting device either of its shiiitnbic l trnvel of the type-bnr to tl and back to its normei position.

In testimony whereof, li siii); niv si ture, in tlie prcsenceoi' twosiibscii nesses.-

Witnesses:

Eminem iii. P finizr if?, Ames. 

